- #1
turbos4audi
- 10
- 0
Hello all,
We have a manganese phosphating process for gun parts and I am having trouble with some parts coming out with a lighter coating than normal. Our orginal steps which, for years, have produced repeatable high quality results are; Sand blast with aluminum oxide, phospahte bath at 190°F for 20-30 min, flowing water rinse, water displacing oil bath (WD-40), and then air dry.
What has changed is that we bought a Goff 1244 spinner hanger shot blast machine and are going to use it in place of the manual sandblasting. We are using Chronital S20 Stainless Steel shot. It does a great job at removing any old coatings and oxidation. But when we parkerize parts from this machine, they come out much lighter than when sand blasted.
I am going to set up an alkline bath and rinse to do between blasting and parking.
I want to see if anyone had any thought on this or experience.
Let me know if you have any questions.
Thanks,
Chris
We have a manganese phosphating process for gun parts and I am having trouble with some parts coming out with a lighter coating than normal. Our orginal steps which, for years, have produced repeatable high quality results are; Sand blast with aluminum oxide, phospahte bath at 190°F for 20-30 min, flowing water rinse, water displacing oil bath (WD-40), and then air dry.
What has changed is that we bought a Goff 1244 spinner hanger shot blast machine and are going to use it in place of the manual sandblasting. We are using Chronital S20 Stainless Steel shot. It does a great job at removing any old coatings and oxidation. But when we parkerize parts from this machine, they come out much lighter than when sand blasted.
I am going to set up an alkline bath and rinse to do between blasting and parking.
I want to see if anyone had any thought on this or experience.
Let me know if you have any questions.
Thanks,
Chris